<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    /* 选择器 */
    /* 内嵌式 */

    p {
        color: burlywood;
        font-size: 30px;
        background-color: green;
        width: 300px;
        height: 50px;
    }
</style>

<body>
<p>Hello,world!</p>

</body>

</html>